Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The linearVelocity read-only property of the XRPose interface is a DOMPointReadOnly describing the linear velocity in meters per second relative to the base XRSpace.
A DOMPointReadOnly describing the linear velocity in meters per second relative to the base XRSpace. Returns null if the user agent can't populate this value.